Mounting frame for electrical apparatus



Oct. 18, 1932. I MEAD 1,882,854

MOUNTING FRAME FOR ELECTRICAL APPARATUS Fileu Dec. 10. 1951 /N Vz N TOR E. 0. MEAD A TTORNEV form part of the Patented Oct. 18, 1932 9K sea. "a 42.4"

-i EDW'ARD MEAD, O1 CALIDVJELL, NEW 5E1 EY, ASSIGNOR TO BELL TELElHONE LAB- GRATOREES, INCOB-PGRAEED, OF Ial'El/V YORK, 1., A COHPGRA'EION 0F NEW YORK IvIOUNTING FRZAIVIE ELECTRICAL AYPJSR-ATUS Application filed December 10, 1831. Eerial l-Ic. 586,104.

"This invention relates to supporting frames for electucal apparatus and more specifically to a mounting plate for telephone apparatus.

In certain types of framework used in telephone exchanges, for example, it is cu tomary to men a plurality of he 'izontally disposed mountin plates in close proximity to each other on t upright supports which rariework proper. Sn the horizontal plates are mounted in preassigned places electrical apparatus such as relays, resistances, condensers of different types and sizes depending upon certain re- 15 quiroinents, the plates being drilled or otherwise perforated to receive such apparatus. in this type of mounting frame, however, it is frequentlynecessary to transpose these pieces of apparatus on the plates. Such transposition in turn, necessitates the replacement of the plates thus afiected by other differently rforated plates to receive new combinaion of pieces of apparatus, such a plate being perforated only upon the determination' of the requirements.

The object of this invention is to provide an improved support for equipment such as relays and the like whereby the rearrangement of the elec .cal apparatus or the addi- 3()""tion of such equipment may be effected in a simple and convenient manner and without necessitating the replacement of the mounting element. The invention comprises a pa r of rail members secured in parallel relation 33 "and mounted on the upright supports of the raineworlz, these rail members being common to a relatively great number of pieces of aratus or supports to be mounted thereon, sch piece of apparatus having associated therewith a pair of plates properly apertured for receiving sets of terminals coin rised in that particular piece of apparatus. Each pair of plates forms a clamping device, the fa tening screws of which "engage the apparatus for securing it and the plates collectively on the bars.

More specifically, he supporting is made up of two similarly shaped rail members having their ends bent substantially at "right angles and welded together to form a lat-e formed belts or screws for securing the bar on upr 1 ports of the framework.

itnres and advantages oi the inappear from the following deand by the claims appended there- 'L be ng had to the accompanyin which:

is a partial view or" the mounting bar she *in the relative position of the ele- O b u n a clampin device and an electrical 1 respect to the bar, each bew1'. apaiauis vii eir upright supports s i clamping devices'in p a ot the bars and a number of p' aratus clamped in position on and 3 is a cross-sectional view taken apinawy on line 3-3 in Fig. 2.

n the drawing 10 and 11 indicate si1n shaped rail members having portions bent substantially at 1 right angles and welded together to to a lnountingbar 1 unit structure. To the ends of the mountg bar thus formed are welded the plates 9 and 13 shown in 1 and 2 for r intorcing tie bar at these points, tes also serving for securing the supti bar on upright supports, such as 1% anc. 15 shown in Fig". 2.

The rails 10 and 1 are formed with subtantially T-shaped ribs 16 and 16 which extend the whole length thereof for n1ounting a plurality of clamping devices in the form of pairs of similarly shaped plates 17 and 18. These plates are provided with pro ui.) w

jections 19 and 20 adapted to fit into the recesses formed by the rib portions 16 and 16 and the rail members 10 and 11 as shown in Figs. 2 and 3. A number of screws such as 21 protrude through insulating washers 31, through relatively large clearance holes 32 in the clamping plates 17 and 18, through close fitting clearance holes 25 and 27 in an insulating spacer member 2 2', hrougli the holes 33 and Set of another insulating plate 35, for threadedly engaging with prongs 23 formin the base of a relay R partially shown in Figs. 1 and 3, the clamping plates 17 and 18 having similar locating pins 2 1 and 25 disposed in registry with holes 16 and 4&7 in the insulating plates 22 for maintaining this relay and the plates 17 and 18 in adjusted position relative to each other and thereby preventing the accidental contact of "the screws 21 with clamping plates 17 and 18.

As above specified each electrical apparatus to be mounted on the bar is provided with a pair of clamping plates, such .as 17 and 18 of the required width to "form a base for the a paratus and these plates are p properly apertured to receive their fastening screws 21 and t is combination of wire terminals individual to that apparatus which may take the shapes indicated by he clamping plates shown in Fig. 2 which are perforated to receive the combination of terminals in their respective pieces of apparatus which may be a relay, a resistance or a condenser of a particular type and size, this arrangement permitting the transposition of these pieces of apparatus place along the bar according to any predetermined requirement without replacing the affected bar by another bar and without removing the bar thus afiected from the framework.

What is claimed is:

1. A. pair of spaced parallelly disposed bars, apparatus to be mounted thereon, a pair of plates for each piece of apparatus, and a common securing device for clamping the bars between each pair of plates and the piece of apparatus to the plates.

2. A mounting bar for electrical apparatus comprising a pair of rail members, a pair of clamping plates for each piece of apparatus engaging said members, one of said plates forming a mounting base therefor, and means for securing said plates to said members and said piece of apparatus to said plates.

3. A mounting bar for electrical apparatus comprising a pair of rail members each having a T-shaped rib formed therewith, a pair of clamping plates individual to each piece of apparatus, said plates having portions arranged for engagement with the rib of each of said members, and means for securing said plates on said members and said piece of apparatus to said plates.

fit. A mounting bar for electrical apparatus comprising a pair of parallelly disposed rail members, each of said members having a T- shaped rib formed therewith, clamping plates having portions engaging said rib, one of said plates forming a mounting base for the apparatus, and means for securing said plates and the apparatus on said members collectively.

5. A mounting bar for electrical apparatus comprising a pair of parallelly disposed rail members welded together at their ends, rib portions formed with said members and extending substantially the whole length thereof, a pair of clampin plates mounted on said members, one of said plates serving as a mounting base for the apparatus, and means for securing said plates and the apparatus on said members collectively.

In witness whereof, I hereunto subscribe my name this 8th day of December, 1931.

EDWARD D. MEAD. 

